Anyone know how to output sound to two sound cards simultanously?

[rlee]

I have headphones connected to my onboard realtek sound card, and I have my speakers connected to my PCI audigy 2 card. drivers have been installed for both cards. in vista, i can only choose 1 soundcard as the default output. Is there anyway to output all sounds to both devices at the same time?

 

[coolhandluke]

No, windows won't allow that.

You can use a splitter like the one below to connect the speakers and headphones to the same source though.
http://www.monoprice.com/products/product.asp?c_id=102&cp_id=10218&cs_id=1021802&p_id=667&seq=1&format=2

 

[ilovellamafood]

If you are like me you will daisy chain 3 of these things for 4 separate speakers.